<div class="panel panel-default {% block box_class %}{% endblock box_class %}"
        {% block box_attrs %}{% endblock box_attrs %}>
    <div class="panel-heading"><i class='icon fa fa-chevron-up chevron'></i>
        <h3 class="panel-title">{% block box_title %}{% endblock box_title %}</h3></div>
    <div class="panel-body {% block box_content_class %}{% endblock box_content_class %}"
            {% block box_content_attrs %}{% endblock box_content_attrs %}>
        {% block box_content %}{% endblock box_content %}
    </div>
    {% block box_extra %}{% endblock box_extra %}
</div>
